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[1]江麗華,卓桂華,陳細(xì)妹,等.藥劑聯(lián)合高溫對(duì)低有機(jī)質(zhì)污泥水解促進(jìn)研究[J].中國(guó)給水排水,2022,38(19):86-92.
JIANGLi-hua,ZHUOGui-hua,CHENXi-mei,et al.Effects of Chemical Agent Combined with High Temperature on Hydrolysis of Sludge with Low Organic Content[J].China Water & Wastewater,2022,38(19):86-92.
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JIANGLi-hua,ZHUOGui-hua,CHENXi-mei,et al.Effects of Chemical Agent Combined with High Temperature on Hydrolysis of Sludge with Low Organic Content[J].China Water & Wastewater,2022,38(19):86-92.
藥劑聯(lián)合高溫對(duì)低有機(jī)質(zhì)污泥水解促進(jìn)研究
中國(guó)給水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期數(shù): 2022年第19期 頁碼: 86-92 欄目: 出版日期: 2022-10-01
- Title:
- Effects of Chemical Agent Combined with High Temperature on Hydrolysis of Sludge with Low Organic Content
- 關(guān)鍵詞:
- 低有機(jī)質(zhì)污泥; 高溫?zé)崴? 聯(lián)合預(yù)處理; 厭氧消化; 有機(jī)物溶出
- Keywords:
- sludge with low organic content; thermophilic hydrolysis; combined pretreatment; anaerobic digestion; dissolution of organic matter
摘要:- 厭氧消化是實(shí)現(xiàn)污泥穩(wěn)定和能源回收的主要途徑之一。我國(guó)南方地區(qū)污水處理廠廣泛采用生物營(yíng)養(yǎng)物去除工藝，普遍存在進(jìn)水有機(jī)物含量低的問題，導(dǎo)致污泥有機(jī)質(zhì)含量也偏低（VS/TS<0.6）。針對(duì)南方典型低有機(jī)質(zhì)污泥，在120 ℃、0.5 h條件下分別投加NaOH、Ca（OH）2和CaCl2進(jìn)行聯(lián)合高溫?zé)崴忸A(yù)處理后，進(jìn)行中溫厭氧消化。結(jié)果表明，投加藥劑聯(lián)合高溫?zé)崴獯龠M(jìn)了溶解性有機(jī)碳（SOC）、可溶糖、可溶性蛋白質(zhì)的溶出，進(jìn)而提高了累積產(chǎn)甲烷量。在高溫?zé)崴忸A(yù)處理過程中，藥劑對(duì)有機(jī)物的溶出效果為NaOH>Ca（OH）2>CaCl2。在后續(xù)厭氧消化過程中，由于CaCl2可提高SCOD中碳水化合物占比，投加CaCl2聯(lián)合高溫?zé)崴夂罂偦瘜W(xué)需氧量（TCOD）和總糖降解效果明顯，TCOD降解量為25 326 mg/L且總糖降解量在TCOD降解量中占比最高（87.7%），因而3 種藥劑中CaCl2的累積產(chǎn)甲烷量最高（183.1 mL/gVS）。CaCl2聯(lián)合高溫?zé)崴忸A(yù)處理較NaOH、Ca（OH）2更能提高低有機(jī)質(zhì)污泥的厭氧產(chǎn)沼性能。
Abstract:- Anaerobic digestion is one of the main strategies to facilitate sludge stabilization and energy recovery. The biological nutrient removal process is widely applied in wastewater treatment plants in southern China, and the widespread low content of influent organic matter results in the low content of sludge organic matter (VS/TS < 0.6). In this paper, the typical sludge with low organic content in southern China was first pretreated with chemical agents including NaOH, Ca(OH)2 and CaCl2 combined with thermophilic hydrolysis at 120 ℃ for 0.5 h. Then, the sludge was used as the substrate for mesophilic anaerobic digestion. The addition of chemical agents combined with thermophilic hydrolysis promoted the release of soluble organic carbon (SOC), soluble sugar and soluble protein, and increased the cumulative methane production. In the process of thermophilic hydrolysis pretreatment, the efficiency of chemical agents for dissolution of organic matters in descending order was NaOH, Ca(OH)2 and CaCl2. In the subsequent anaerobic digestion process, since CaCl2 promoted the proportion of carbohydrates in SCOD, the degradation efficiencies of total chemical oxygen demand (TCOD) and total sugar were obviously improved after dosing CaCl2 combined with thermophilic hydrolysis. The degradation of TCOD was 25 326 mg/L, and the degradation of total sugar accounted for the highest proportion of the degraded TCOD (87.7%), so the cumulative methane production of CaCl2 among the three agents was the highest (183.1 mL/gVS). The addition of CaCl2 combined with thermophilic hydrolysis pretreatment was more effective to enhance the anaerobic biogas production performance of low organic sludge than NaOH and Ca(OH)2.
更新日期/Last Update: 2022-10-01
